Knocked out my eth0 somehow

[outchy]

I followed the last step in this post in order to have a mount point for my samba share:

http://ubuntuforums.org/showthread.php?t=30377

It worked, but when I tried unmounting it, my machine hung up and I rebooted.

Now, I can no longer connect to that particular share at all (but I can connect to others) and I have no more internet connection on eth0 at all, getting a 169 IP address.

When I do a "ifdown eth0", I get interface eth0 not configured.

When I do a "ifup eth0", I get "Ignoring unknown interface eth0=eth0".

I have NO idea how to fix this. My wireless still works, but it's super slow.

I'd love to get my lan back. Thanks for any ideas. Running 8.04 on a Dell Inspiron 600m.

[Endwin]

Could be a couple of things but some info would help what is the contents of /etc/network/interfaces and /etc/udev/rules.d/70-persistent-net.rules

And the command ifconfig -a

[outchy]

Could be a couple of things but some info would help what is the contents of /etc/network/interfaces and /etc/udev/rules.d/70-persistent-net.rules

And the command ifconfig -a
nik@nik-ubuntu:~$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

---------------------------------------

nik@nik-ubuntu:~$ cat /etc/udev/rules.d/70-persistent-net.rules
# This file maintains persistent names for network interfaces.
# See udev(7) for syntax.
#
# Entries are automatically added by the 75-persistent-net-generator.rules
# file; however you are also free to add your own entries.

# PCI device 0x14e4:0x16a6 (tg3)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0b:db:05:29:11", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

# PCI device 0x8086:0x1043 (ipw2100)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:04:23:4c:20:66", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

---------------------------------------

nik@nik-ubuntu:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:0b:db:05:29:11
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5555 errors:0 dropped:0 overruns:0 frame:0
TX packets:349 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:640443 (625.4 KB) TX bytes:55872 (54.5 KB)
Interrupt:11

eth1 Link encap:Ethernet HWaddr 00:04:23:4c:20:66
inet6 addr: fe80::204:23ff:fe4c:2066/64 Scope:Link
UP BROADCAST MULTICAST MTU:1492 Metric:1
RX packets:76081 errors:2 dropped:0 overruns:0 frame:0
TX packets:52513 errors:2 dropped:0 overruns:0 carrier:2
collisions:0 txqueuelen:1000
RX bytes:74517162 (71.0 MB) TX bytes:6180823 (5.8 MB)
Interrupt:5 Base address:0xe000 Memory:fafef000-fafeffff

eth0:avahi Link encap:Ethernet HWaddr 00:0b:db:05:29:11
inet addr:169.254.2.202 Bcast:169.254.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:11

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1881 errors:0 dropped:0 overruns:0 frame:0
TX packets:1881 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:94792 (92.5 KB) TX bytes:94792 (92.5 KB)

[Endwin]

Looks like the problem is in your /etc/network/interfaces there is no config information anymore.

Edit it as root:

sudo nano /etc/network/interfaces

and add


auto eth0
iface eth0 inet dhcp


Restart the networking with:
sudo /etc/init.d/networking restart

See if that solves your problem.

[outchy]

Looks like the problem is in your /etc/network/interfaces there is no config information anymore.

Edit it as root:

sudo nano /etc/network/interfaces

and add


auto eth0
iface eth0 inet dhcp


Restart the networking with:
sudo /etc/init.d/networking restart

See if that solves your problem.
No, that didn't work :/ Now I'm not seeing any Wired Networks when I click the icon in the taskbar:

nik@nik-ubuntu:/var/run$ sudo /etc/init.d/networking restart
* Reconfiguring network interfaces... RTNETLINK answers: No such process
Internet Systems Consortium DHCP Client V3.0.6
Copyright 2004-2007 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/eth0/00:0b:db:05:29:11
Sending on LPF/eth0/00:0b:db:05:29:11
Sending on Socket/fallback
DHCPRELEASE on eth0 to 172.16.56.1 port 67
There is already a pid file /var/run/dhclient.eth0.pid with pid 134519072
Internet Systems Consortium DHCP Client V3.0.6
Copyright 2004-2007 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/eth0/00:0b:db:05:29:11
Sending on LPF/eth0/00:0b:db:05:29:11
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9
No DHCPOFFERS received.
No working leases in persistent database - sleeping.

What else can I show you that might help?

[Endwin]

Maybe I should have asked this earlier, but what is the network setup? Do you have a router with a DHCP server?

Looks like it tries to get an IP but cannot find the dhcp server.

I was working with this common network setup:

INTERNET <=> ROUTER <=> PC

[outchy]

Maybe I should have asked this earlier, but what is the network setup? Do you have a router with a DHCP server?

Looks like it tries to get an IP but cannot find the dhcp server.

I was working with this common network setup:

INTERNET <=> ROUTER <=> PC
Not exactly, I'm in a school building and to be honest, I'm a little out of my league when it comes to the network side of things (my boss/network manager isn't in today, otherwise I'd ask him). So I think I'm just going to back my stuff up and reinstall the entire OS. I only installed it the other day and don't have much to lose. But thank you very much for your help on this, I really appreciate it.

[outchy]

Not exactly, I'm in a school building and to be honest, I'm a little out of my league when it comes to the network side of things (my boss/network manager isn't in today, otherwise I'd ask him). So I think I'm just going to back my stuff up and reinstall the entire OS. I only installed it the other day and don't have much to lose. But thank you very much for your help on this, I really appreciate it.
Eek... so I reinstalled the entire OS and my Wired Network is showing up now... but I still can't connect to the internet or the share from before. Does that mean it's something on the server side?

[Endwin]

Perhaps a lot depends on how your network is setup. If the DHCP sever does not work then well you either need to fix it or manually put in all the info.

You said eth0 was back up. What does ifconfig give you? Can you ping the server you want to get to? If you ping www.google.com from a machine with net, copy the IP from that, and ping that IP from the computer with problems does it work?

Possible you either have a DHCP or DNS issue.

[outchy]

Perhaps a lot depends on how your network is setup. If the DHCP sever does not work then well you either need to fix it or manually put in all the info.

You said eth0 was back up. What does ifconfig give you? Can you ping the server you want to get to? If you ping www.google.com from a machine with net, copy the IP from that, and ping that IP from the computer with problems does it work?

Possible you either have a DHCP or DNS issue.
DCHP is definitely working in the building... perhaps my machine got blacklisted somehow?

I can ping some servers on the network, and some I cannot. Here is my ifconfig:

nik@ubuntu:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:0b:db:05:29:11
inet6 addr: fe80::20b:dbff:fe05:2911/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3809 errors:0 dropped:0 overruns:0 frame:0
TX packets:2302 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2807362 (2.6 MB) TX bytes:329503 (321.7 KB)
Interrupt:11

eth1 Link encap:Ethernet HWaddr 00:04:23:4c:20:66
inet6 addr: fe80::204:23ff:fe4c:2066/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:432 (432.0 B)
Interrupt:5 Base address:0xe000 Memory:fafef000-fafeffff

eth0:avahi Link encap:Ethernet HWaddr 00:0b:db:05:29:11
inet addr:169.254.2.202 Bcast:169.254.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:11

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:2010 errors:0 dropped:0 overruns:0 frame:0
TX packets:2010 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:108028 (105.4 KB) TX bytes:108028 (105.4 KB)

And I cannot ping Google's IP. The only ones that work are some of the ones on our intranet...

[outchy]

DCHP is definitely working in the building... perhaps my machine got blacklisted somehow?

I can ping some servers on the network, and some I cannot. Here is my ifconfig:

nik@ubuntu:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:0b:db:05:29:11
inet6 addr: fe80::20b:dbff:fe05:2911/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3809 errors:0 dropped:0 overruns:0 frame:0
TX packets:2302 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2807362 (2.6 MB) TX bytes:329503 (321.7 KB)
Interrupt:11

eth1 Link encap:Ethernet HWaddr 00:04:23:4c:20:66
inet6 addr: fe80::204:23ff:fe4c:2066/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:432 (432.0 B)
Interrupt:5 Base address:0xe000 Memory:fafef000-fafeffff

eth0:avahi Link encap:Ethernet HWaddr 00:0b:db:05:29:11
inet addr:169.254.2.202 Bcast:169.254.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:11

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:2010 errors:0 dropped:0 overruns:0 frame:0
TX packets:2010 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:108028 (105.4 KB) TX bytes:108028 (105.4 KB)

And I cannot ping Google's IP. The only ones that work are some of the ones on our intranet...
And this is still the same as before...

nik@ubuntu:~$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

[Endwin]

Doing some reading /etc/network/interfaces is edited by the GUI editor not how it was in ubuntu 6.06, but something new I will have to see how it is doing it now. I wonder if you are blacklisted for some reason. Look at the firewall for the router and see if your MAC or IP address is being blocked in the logs. If you can get around on the inside but not outside something is stopping the route.

[outchy]

I figured it out (well, my friend at work did). I gave myself a static IP on the wrong subnet... and I also assigned the same IP to both my lan and my wireless. Oops...

So, mystery solved. Thanks again, man. Good looking out.